<template>
    <div>
        <div class="search">
            <input v-model="keyWord" type="text" placeholder="输入城市名或拼音" class="search-input">
        </div>
        <div 
            class="search-content" 
            ref='search'
            v-show='keyWord'
            >
            <ul>
                <li class="search-item border-bottom" v-for='item in list' :key='item.id' @click='handleCityClick(item.name)'>{{ item.name }}</li>
                <li class="search-item border-bottom" v-show='hasNoData'>没有找到匹配城市</li>
            </ul>
        </div>
    </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapMutations } from 'vuex'
export default {
    name:'CitySearch',
    props: {
        cities:Object
    },
    data () {
        return {
            keyWord: '',
            list: [],
            timer: null
        }
    }, 
    methods: {
        handleCityClick(city) {
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },   
    watch: {
        keyWord () {
            if(this.timer){
                clearTimeout(this.timer)
            }
            if(!this.keyWord){
                this.list = []
                return
            }
            this.timer = setTimeout(() => {
                const result = []
                for (let i in this.cities){
                    this.cities[i].forEach((value) =>{
                        if(value.name.indexOf(this.keyWord) >-1 || 
                        value.spell.indexOf(this.keyWord) > -1){
                            result.push(value)
                        }
                    })
                }
                this.list = result
            },100)
        }
    },
    computed:{
        hasNoData () {
            return !this.list.length
        }
    },
    mounted () {
        this.scroll = new BScroll(this.$refs.search)
    }
}
</script>

<style lang='stylus' scoped>
    @import '~styles/varibles.styl'
    .search
        height .72rem
        padding 0 .1rem
        background $bgColor
        .search-input
            height .62rem
            line-height .62rem
            width 100%
            text-align center
            border-radius .06rem
            color #666
            padding 0 .1rem
            box-sizing border-box
    .search-content
        overflow hidden
        position absolute
        top 1.58rem
        left 0
        bottom 0
        right 0
        z-index 1 
        background #eee
        .search-item
            line-height .62rem
            padding-left .2rem
            color #666 
            background #fff
</style>
